Method for fabricating color filter substrate for a liquid crystal display device with color filter having polarizing function

ABSTRACT

A color filter layer structure usable in a display device according to one embodiment of the present invention includes a color filter layer on a substrate, the color filter layer having a polarizing function and made of a liquid crystal material deposited on the substrate, wherein a force is applied to the deposited liquid crystal material in one direction to form the color filter layer.

This application is a divisional of U.S. application Ser. No.10/951,726, filed Sep. 29, 2004 now U.S. Pat. No. 7,532,289, whichclaims priority on Korean Patent Application No. 2003-0083423, filed onNov. 24, 2003, the entire contents of which are hereby incorporated by.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a liquid crystal display (LCD) device,particularly, to a color filter substrate for the LCD device and afabricating method of the color filter substrate wherein the colorfilter layer of the color filter substrate is made of lyotropic liquidcrystal and acts as a polarizer.

2. Discussion of the Related Art

LCD devices are developed as the next generation display devices becauseof their lightweight, thin profile, and low power consumptioncharacteristics. In general, an LCD device is a non-emissive displaydevice that displays images using a refractive index difference havingoptical anisotropy properties of liquid crystal material that isinterposed between a thin film transistor (TFT) array substrate and acolor filter (C/F) substrate. Presently, among the various types of LCDdevices commonly used, active matrix LCD (AM-LCD) devices have beendeveloped because of their high resolution and superiority in displayingmoving images. The AM-LCD device includes a TFT per each pixel region asa switching device, and first and second electrodes, the secondelectrode being used as a common electrode.

The LCD device includes upper and lower substrates, and a liquid crystallayer interposed therebetween. The upper substrate and lower substrateare commonly referred to as a color filter substrate and an arraysubstrate, respectively. A common electrode and color filter layers areformed on the upper substrate through processes for fabricating a colorfilter substrate. Similarly, TFTs and pixel electrodes are formed on thelower substrate through processes for fabricating an array substrate.

A liquid crystal display device according to a related art is explainedin detail with reference to FIG. 1 which shows a perspective view of anLCD device according to the related art.

Referring to FIG. 1, upper and lower substrates 10 and 20 are arrangedto face each other with a liquid crystal layer 40 interposedtherebetween. On an inner surface of the upper substrate 10, a colorfilter layer 14 and a common electrode 18, which functions as oneelectrode for applying an electric field to the liquid crystal layer 40,are subsequently formed. The color filter layer 14 includes red, greenand blue sub color filters for passing only the light of a specificwavelength, and a black matrix 12 that is disposed in the boundaryregions of the sub color filters and shields the light from the regionsin which the alignment of the liquid crystal layer 40 is uncontrollable.On an inner surface of the lower substrate 20, a plurality of gate lines22 and a plurality of data lines 24 are formed in a matrix array. A thinfilm transistor T, which functions as a switching device, is disposed ata region where each gate line 22 and data line 24 crosses, and a pixelelectrode 36 that is connected to a thin film transistor T is disposedat each pixel region P defined by the region where the correspondinggate and data lines 22 and 24 cross.

Although not shown, this LCD panel further includes upper and lowerpolarizing plates which are placed on the backsides of the upper andlower substrates 10 and 20. A backlight unit which includes a lamp andan optical sheet, and top and bottom cases supporting the LCD panel isplaced on the backside of the lower substrate 20.

FIG. 2 is a schematic cross sectional view showing an LCD device havingpolarizing plates according to a related art.

In FIG. 2, an LCD panel 45 includes an array substrate 21, a colorfilter substrate 11 facing the array substrate 21, a first polarizingplate 50 on the backside of the array substrate 21 and a secondpolarizing plate 52 on the backside of the color filter substrate 11.Although not shown, a liquid crystal layer is disposed between the colorfilter substrate 11 and the array substrate 21

Among them, the array substrate 21 includes a plurality of thin filmtransistors T shown in FIG. 1 and a plurality of pixel electrodes 36each connected to the corresponding thin film transistor T. The colorfilter substrate 11 includes a color filter layer 14 and a commonelectrode 18. The pixel electrode 36 is practically formed in each pixelregion P shown in FIG. 1 in comparison with the common electrode 18.

Generally, the color filter layer 14 includes red, green and bluesub-color filters which are arranged in order. Each of the red, greenand blue sub-color filters is located to correspond to each pixel regionP as shown in FIG. 1. The color filter layer 14 is manufactured by apigment dispersion method known to have a good elaborateness andreproducibility.

Hereinafter, a fabricating method of the color filter substrate by thepigment dispersion method will be explained referring to FIGS. 3A-3D.Particularly, FIGS. 3A to 3D are schematic cross sectional views showinga fabricating process by a pigment dispersion method of a color filtersubstrate for an LCD device according to a related art.

In FIG. 3A, a black matrix 12 is formed by coating (or depositing) alight blocking material such as black resin and chromium (Cr) basedmaterials on a substrate 10. For example, the black matrix 12 may bepatterned and manufactured by photolithography using a photoresistpattern. The black matrix 12 is located in the boundaries of the pixelregions P in order to prevent leakage and to shield the thin filmtransistors T from incident lights as shown in FIG. 1.

In FIG. 3B, a red resist layer 13 is formed by spin coating or barcoating of a red resist material over the entire surface of thesubstrate 10 including the black matrix 12.

Next, a mask 15 having a transmissive portion TP and a shielding portionSP is disposed over the substrate 10 having the black matrix 12, andthen the red resist layer 13 of the substrate 10 is exposed to UV lightthrough the mask 15.

For example, the red resist layer 13 is a negative type material suchthat an exposed portion of the red resist layer 13 is patterned into ared sub-color filter pattern. Therefore, the transmissive portion TP ofthe mask 15 corresponds to the portion of the red resist layer 13 thatwill be patterned into a red sub-color filter during the step ofexposing.

In FIG. 3C, the exposed portion of the red resist layer 13 shown in FIG.3B is patterned into a red sub-color filter 14 a by developing theexposed portion of the red resist layer 13. Next, curing the redsub-color filter 14 a is performed to cure the red sub-color filter 14a.

In FIG. 3D, green and blue sub-color filters 14 b and 14 c aresequentially formed by the same processes as the process of forming thered sub-color filter 14 a. The green and blue sub-color filters 14 b and14 c are made of green and blue resist materials, respectively. The red,green and blue sub-color filters 14 a, 14 b and 14 c constitute a colorfilter layer 14.

Next, an overcoat layer 16 is formed on the entire surface of the colorfilter layer 14 over the substrate 10, and a common electrode 18 isformed using transparent conductive materials including indium tin oxide(ITO), indium zinc oxide (IZO) and indium tin zinc oxide (ITZO) on theovercoat layer 16. The overcoat layer 16 is specifically formed toprotect the color filter layer 14 and to compensate for the step heightof the color filter layer 14.

As explained above, the color filter substrate according to the relatedart is manufactured through the multiple steps of coating, exposing,developing and curing the color resist materials. After aligning themanufactured color filter substrate and the array substrate to face toeach other, an LCD panel is manufactured by attaching the color filtersubstrate and the array substrate and by interposing a liquid crystallayer between the color filter substrate and the array substrate. Next,by attaching polarizing plates on the backsides of the color filtersubstrate and the array substrate, respectively, the LCD panel iscompleted.

FIG. 4 is a schematic cross sectional view showing the color filtersubstrate, which is manufactured by the process of FIGS. 3A to 3D andhas a polarizing plate.

In FIG. 4, a polarizing plate 52 is placed on the backside of the colorfilter substrate 11 shown in FIGS. 2 and 3D having the black matrix 12,the color filter layer 14, the overcoat layer 16 and the commonelectrode 18.

However, the LCD devices according to the related art have a number ofproblems and limitations. For instance, the polarizing plate 52 for thecolor filter substrate 11 has a light damage due to an interfacereflection. Further, because the thickness range of the polarizing plate52 is more than 200 micrometers, the use of the polarizing plate 52interferes significantly with fabricating a light-weight and slim LCDdevice. Furthermore, the polarizing plate 52 is expensive and the use ofsuch polarizing plates increases the cost of the LCD device. Moreover,the polarizing plate 52 includes a base film, a polarizer layer, and thelike. Because the base film is selected from a hard material, theflexibility of the base film is poor. Therefore, it is practicallydifficult, if not impossible, to use such polarizing plates in flexibledisplays.

SUMMARY OF THE INVENTION

Accordingly, the present invention is directed to a color filtersubstrate having a color filter layer acting as a polarizer for an LCDdevice and a fabricating method of the color filter substrate thatsubstantially obviate one or more of the problems due to limitations anddisadvantages of the related art.

An object of the present invention is to provide a cost-efficient,light-weight and slim LCD device by reducing or eliminating the use ofseparate polarizing plates.

Another object of the present invention is to provide a fabricatingmethod of a color filter substrate having a color filter layer acting asa polarizer.

To achieve these and other advantages and in accordance with the purposeof the present invention, as embodied and broadly described, there isprovided a method of fabricating a color filter layer for a displaydevice, comprising depositing a liquid crystal material on a substrate,and applying a force on the deposited liquid crystal material in onedirection to form a color filter layer having a polarizing function.

According to an aspect of the present invention, there is provided amethod of fabricating a color filter substrate for a display device,comprising forming a color filter substrate having a color filter layeron a substrate, the color filter layer functioning as a polarizer.

According to an aspect of the present invention, there is provided amethod of fabricating a display device, comprising forming a colorfilter substrate having a color filter layer on a substrate, the colorfilter layer functioning as a polarizer, forming an array substrate, andforming a liquid crystal layer between the color filter substrate andthe array substrate.

According to an aspect of the present invention, there is provided acolor filter layer structure usable in a display device, comprising acolor filter layer on a substrate, the color filter layer having apolarizing function and made of a liquid crystal material deposited onthe substrate, wherein a force is applied to the deposited liquidcrystal material in one direction to form the color filter layer.

According to an aspect of the present invention, there is provided acolor filter substrate structure usable in a display device, comprisinga color filter substrate including a color filter layer on a substrate,the color filter layer functioning as a polarizer.

According to an aspect of the present invention, there is provided adisplay device comprising a color filter substrate having a color filterlayer on a substrate, the color filter layer functioning as a polarizer,an array substrate, and a liquid crystal layer between the color filtersubstrate and the array substrate.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary and explanatory and areintended to provide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this specification, illustrate embodiments of the invention andtogether with the description serve to explain the principles of theinvention. In the drawings:

FIG. 1 is a perspective view showing a liquid crystal display deviceaccording to a related art.

FIG. 2 is a schematic cross sectional view showing an LCD device havingpolarizing plates according to a related art.

FIGS. 3A to 3D are schematic cross sectional views showing a fabricatingprocess by a pigment dispersion method of a color filter substrate foran LCD device according to a related art.

FIG. 4 is a schematic cross sectional view showing the color filtersubstrate, which is manufactured by the process of FIGS. 3A to 3D andhas a polarizing plate.

FIG. 5 is a schematic cross sectional view of an exemplary liquidcrystal display device according to the present invention.

FIGS. 6A to 6D and 7A to 7F are schematic views showing a fabricatingmethod of a color filter substrate having a color filter layer acting asa polarizer for an LCD device according to an embodiment of the presentinvention.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS

Reference will now be made in detail to the illustrated embodiments ofthe present invention, examples of which are illustrated in theaccompanying drawings.

FIG. 5 is a schematic cross sectional view of an exemplary liquidcrystal display device 100 according to the present invention.

Referring to FIG. 5, a color filter substrate 111 and an array substrate151 face each other and are spaced apart from each other. A liquidcrystal layer 180 is interposed between the array substrate 151 and thecolor filter substrate 111. A polarizing plate 170 having a firsttransmission axis is placed on the backside of the array substrate 151.However, the color filter substrate 111 has a color filter layer 125acting as a polarizer and is without a separate polarizing plate.

The color filter layer 125 is made of lyotropic liquid crystal and hasan orientation in perpendicular with the transmissive axis of thepolarizing plate 170.

The array substrate 151 includes a first substrate 150, a plurality ofthin film transistors T and a plurality of pixel electrodes 155 eachconnected to the respective thin film transistor T. The pixel electrodes155 are located in the pixel regions P. The array substrate 151 furtherincludes a plurality of gate lines and a plurality of data linescrossing the gate lines to define pixel regions P. The color filtersubstrate 111 includes regions corresponding to the pixel regions P ofthe array substrate 151.

The color filter substrate 111 includes a second substrate 110, a blackmatrix 115 on the second substrate 110, and a color filter layer 125.The black matrix 115 has a plurality of open portions 117 eachcorresponding to one pixel region P. A stabilization layer 120 is formedover the substrate 110 having the black matrix 115. Specifically, thestabilization layer 120 is located in the open portions 117 of the blackmatrix 115 and contacts the surface of the second substrate 110. Thestabilization layer 120 is selected from one of polyamic acid andsilane.

The color filter layer 125 is formed over the second substrate 110having the stabilization layer 120. The color filter layer 125 includesred, green and blue sub-color filters 125 a, 125 b and 125 c. Each ofthe red, green and blue sub-color filters 125 a, 125 b and 125 c islocated in one pixel region P. The color filter layer 125 acts as apolarizer that has the second transmission axis of a vertical directionwith the first transmission axis of the polarizing plate 170. Thus, noseparate polarizing plate is needed on the back side of the secondsubstrate 110.

In addition, a barrier layer 127 is formed on the entire surface of thecolor filter layer 125 over the second substrate 110, an overcoat layer130 is formed on the barrier layer 127, and a common electrode 135 isformed on the overcoat layer 130. Among them, the barrier layer 127 isformed in order to prevent moisture penetration into the color filterlayer 125.

It should be noted that in the exemplary LCD device according to thepresent invention, the array substrate 151 has the polarizing plate 170,but the color filter substrate 111 has the color filter 125 acting as apolarizer without the use of a separate polarizing plate. Therefore,this LCD device 100 can be manufactured as a cost-effective,light-weight and slim type model. Further, the color filter substrate111 having the color filter layer 125 also functioning as a polarizercan be applied effectively to flexible display panels.

Hereinafter, a fabricating method of the color filter substrate having acolor filter layer acting as a polarizer for the LCD device will beexplained.

FIGS. 6A to 6D and 7A to 7F are schematic views showing the fabricatingmethod of a color filter substrate having a color filter layer acting asa polarizer for an LCD device according to a first embodiment of thepresent invention. Specifically, FIGS. 6A to 6D are plan views, andFIGS. 7A to 7F are cross-sectional views. The method of FIGS. 6A-7F areapplicable to form the LCD device of FIG. 5.

In FIGS. 6A and 7A, a black matrix 115 is formed using lightinterception materials through a photolithography on a substrate 110having the pixel regions P shown in FIG. 5. The black matrix 115 isselected from one of chromium (Cr) based materials and black resin. Theblack matrix 115 has a plurality of open portions 117 corresponding tothe pixel regions P.

In FIGS. 6B and 7B, a stabilization layer 120 is formed by coatingpolyamic acid and by drying the polyamic acid layer at predeterminedtemperature over the substrate 110 having the black matrix 115 after thestep of coating the polyamic acid layer. For example, the stabilizationlayer 120 may be formed in each the open portions 117 of the blackmatrix 115 by dispensing through a first ink jet printer 190. At thistime, the stabilization layer 120 has a thickness within a range ofseveral hundreds angstroms to about one thousand angstroms. In addition,the stabilization layer 120 has a role of increasing contact force byreacting to a color filter layer that will be formed on thestabilization layer 120 at relative high temperature.

Next, in FIGS. 6C and 7C, a solution type lyotropic liquid crystalmaterial is prepared. For example, the lyotropic liquid crystal materialis a combination of amine and carboxylic acid, the combination having apredetermined composition ratio. Moreover, the solution type lyotropicliquid crystal corresponds to red, green and blue dyes based material.

A lyotropic liquid crystal layer 123 is formed by coating the solutiontype lyotropic liquid crystal material 124 using a second ink jetprinter 193 on the substrate 110 having the stabilization layer 120shown in FIG. 6B. The lyotropic liquid crystal layer 123 includes red,green and blue lyotropic liquid crystal layers 123 a, 123 b and 123 c.Each of the red, green and blue lyotropic liquid crystal layers 123 a,123 b and 123 c is located in each open portion 117 of the black matrix115.

For example, the red, green and blue dyes for the lyotropic crystallayer 123 correspond to the combined material of amine and carboxylicacid at a predetermined composition ratio. The liquid crystal layer 123has a plat structure and forms a slim and long rod type aggregate in theaqueous solution. Especially, the aggregation has a role such as placingone liquid crystal in the aqueous solution.

Accordingly, as the molecules of the solution type lyotropic liquidcrystal of the liquid crystal layer 123 have a liquid crystal phase, theliquid crystal phase does not depend on temperature but depends onconcentration.

In the meanwhile, each of the red, green and blue lyotropic liquidcrystal layers 123 a, 123 b and 123 c is formed in each pixel region Pby dispensing through a nozzle coating apparatus having three heads 195as shown in FIG. 7C. However, the number of the heads may be variouslychanged, and the heads 195 may be exchanged into some nozzles.

At this time, the black matrix 115 has a hydrophobic property. On theother hand, the solution type lyotropic liquid crystal material of theliquid crystal layer 123 has a hydrophilic property. Therefore, thesolution type lyotropic liquid crystal material can be easily separatedfrom the black matrix 115 due to their different surface properties andis located on the stabilization layer 120 in the open portions 117 ofthe black matrix 115.

At this time, a top surface of the lyotropic liquid crystal layer 123should be positioned higher than a tope surface of the black matrix 115so that the surface of the lyotropic liquid crystal layer 123 has anorientation in a predetermined direction. For example, the lyotropicliquid crystal layer 123 may have a thickness within a range of about 5micrometers to about 20 micrometers. The color purity of the lyotropicliquid crystal layer 123 can be controlled by combining the color dyes.

Next, in FIGS. 6D and 7D, the surface of the lyotropic liquid crystallayer 123 shown in FIG. 6C gets a proper pressure using a blade 189 of abar coater being capable of applying shear force in one direction. Thistime, by moving the blade 189 or a stage for the substrate 110, thelyotropic liquid crystal layer 123 is arranged in one direction.

Simultaneously, the blade 189 makes the top surface of the lyotropicliquid crystal layer 123 flat with respect to the top surface of theblack matrix 115 by removing the top-surface height difference betweenthe lyotropic liquid crystal layer 123 and the black matrix 115.

It should be noted that the moving direction of the blade 189 or thestage is a perpendicular direction with respect to the transmission axisof the polarizing plate 170 of the array substrate 151 as shown in FIG.5. As a result, after applying the shear force using the blade 189, acolor filter layer 125 is formed with the lyotropic liquid crystal layer123. The color filter layer 125 includes red, green and blue sub-colorfilters 125 a, 125 b and 125 c formed of the red, green and bluelyotropic liquid crystal layers 123 a, 123 b and 123 c, respectively.Especially, the color filter layer 125 acts as a polarizer havinganother transmission axis in perpendicular with the one transmissionaxis of the polarizing plate 170 of the array substrate 151 as shown inFIG. 5, because the shear force is applied in one particular directionto the lyotropic liquid crystal layer 123.

A slit coater having slit(s) can be used instead of the bar coaterhaving the blade 189. By using the slit of the slit coater, thelyotropic liquid crystal layer 123 can also obtain an orientation in onedirection.

Next, FIG. 7E, because the color filter layer 125 of FIG. 7D is still aliquid state, this color filter layer is transformed into a solid typeby drying at about 30° C. to about 90° C. for a predetermined time andby removing the moisture in the color filter layer 125.

Sequentially, a baking apparatus such as an oven having a chamber isprepared. The substrate 110 having the solid type color filter layer 125is placed in the baking apparatus or other suitable heating device. Thenthe solid type color filter layer 125 is completely cured for about 10minutes to about 60 minutes at about 150° C. to about 250° C. During thestep or curing, one portion of the amine and carboxylic acid of thestabilization layer 120 underneath of the color filter layer 125 reactswith the stabilization layer 120, and the other of the amine andcarboxylic acid of the stabilization layer 120 reacts with the lyotropicliquid crystal of the color filter layer 125. Therefore, the contactforce between the stabilization layer 120 and the color filter layer 125is increased, and the color filter layer 125 can be stably formed.

For example, the lyotropic liquid crystal layer 123 as shown in FIG. 7Cmay have a thickness within a range of about 5 micrometers to about 10micrometers, and the final thickness of the color filter layer 125formed of the lyotropic liquid crystal layer 123 may have within a rangeof about 0.3 micrometers to about 1.5 micrometers.

Next, a barrier layer 127 is formed on the entire surface of the colorfilter layer 125 using, e.g., barium chloride (BaCl) for preventingmoisture penetration into the color filter layer 125.

In FIG. 7F, an overcoat layer 130 is formed using organic insulatingmaterial such as transparent photo acryl on the barrier layer 127, and acommon layer 135 is formed using one of transparent conductive materialssuch as indium tin oxide (ITO), indium zinc oxide (IZO) and indium tinzinc oxide (ITZO) on the overcoat layer 130. However, the overcoat layer130 may be omitted.

As explained above, the color filter substrate according to the presentinvention includes the color filter layer acting as the polarizer thatmakes the light transmit in one direction. Therefore, it is notnecessary to provide a separate polarizing plate. Consequently, thepresent invention provides a lightweight, slim, and cost-effective LCDdevice. Further, the color filter substrate of the present invention canbe used effectively in flexible displays.

A second embodiment according to the present invention provides afabricating method of a color filter substrate having a color filterlayer acting as a polarizer. In this embodiment, instead of using thestabilization layer mode of polyamic acid, silane is used as astabilization layer material.

Because the fabricating method of the first embodiment may be applied tothe second embodiment except for the step of forming the stabilizationlayer, the second embodiment will be explained referring to FIGS. 6A to6D and 7A to 7F.

At first, methoxysilane is coated over the substrate 110 having theblack matrix 115. The methoxysilane is a solution type having amino andepoxy. Specifically, the methoxysilane may be dispensed by an ink jetprinter or nozzle coating apparatus in the open portions 117 of theblack matrix 115 as shown in FIG. 7B.

Next, a stabilization layer is formed by drying the methoxysilane layerfor about 5 minutes to about 10 minutes. For example, the stabilizationlayer has a thickness within a range of several hundreds angstroms toabout one thousand angstroms. In addition, the color filter layer 125 isformed on the stabilization layer through the same process as the firstembodiment.

At this time, during the step of curing of the color filter layer 125 asexplained in the first embodiment, in the second embodiment, methoxy ofthe silane is hydrolyzed and the hydrolyzed methoxy is firmly fixed byreacting to silicon-oxygen (Si—O—) of the substrate 110. In addition,amino or epoxy of silane reacts with the color filter layer 125, so thecontact force between the color filter layer 125 and the stabilizationlayer made of methoxysilane increases.

The subsequent steps of the second embodiment method are the same asthose of the first embodiment method and are thus omitted.

According to the present invention, because the color filter substrateincludes the color filter layer acting as a polarizer, only one separatepolarizing plate for the array substrate is needed. Therefore, onepolarizing plate is in demand in the LCD device according to the presentinvention, thereby providing a cost-effective, light-weight and slimdisplay device.

Moreover, the red, green and blue color filter layers can besimultaneously formed through one process using an ink jet printer or anozzle coating apparatus, thereby reducing the material cost and processtime. In addition, by reducing the thickness of the LCD device, the LCDdevice can be easily applied to a flexible display. The presentinvention can be applied to other display devices.

Additionally, a sheet polarizer according to the related art is anordinarily type polarizer, but the color filter layer acting as apolarizer according to the present invention corresponds to anextraordinary type polarizer. Generally, the extraordinary typepolarizer has a better viewing angle property than the ordinary typepolarizer. Moreover, when the extraordinary type polarizer and theordinary type polarizer are used as a set, the viewing angle property isfar better than when the same ordinary types are used in a set. This isbecause the crystal axis of the polarizer can be arranged with the samedirection.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the LCD device havingpatterned spacers and method of fabricating an LCD device havingpatterned spacers of the present invention without departing from thespirit or scope of the invention. Thus, it is intended that the presentinvention cover the modifications and variations of this inventionprovided they come within the scope of the appended claims and theirequivalents.

1. A color filter substrate structure usable in a display device,comprising: a color filter substrate including a color filter layer on asubstrate, the color filter layer functioning as a polarizer; and abarrier layer over the color filter layer, wherein the barrier layerincludes barium chloride (BaCl).
 2. The color filter substrate structureaccording to claim 1, wherein the color filter substrate furtherincludes: a black matrix between portions of the color filter layer; anda common electrode over the color filter layer.
 3. The color filtersubstrate structure according to claim 1, wherein the color filter layeris made of a liquid crystal material deposited on the substrate, aliquid crystal phase of the liquid crystal material being oriented inone direction by applying a force on the liquid crystal material in theone direction.
 4. The color filter substrate structure according toclaim 1, wherein the liquid crystal layer includes a lyotropic liquidcrystal material.
 5. The color filter substrate structure according toclaim 3, wherein the color filter layer polarizes light, and the onedirection of the color filter layer corresponds to a transmissive axisof the color filter layer.
 6. The color filter substrate structureaccording to claim 2, further comprising: a stabilization layer underthe color filter layer, the stabilization layer being located in atleast one open portion of the black matrix.
 7. The color filtersubstrate structure according to claim 6, wherein the stabilizationlayer has a thickness in a range of about 100 angstroms to about 1,000angstroms.
 8. The color filter substrate structure according to claim 6,wherein the stabilization layer includes: a stabilization material layerin the at least one open portion of the black matrix, the stabilizationmaterial layer being composed of one of solution type polyamic acid andmethoxysilane.
 9. The color filter substrate structure according toclaim 3, wherein the liquid crystal material is a red, green and bluedye based solution having a combination of amine and carboxylic acid.10. The color filter substrate structure according to claim 1, whereinthe color filter layer has a thickness in a range of about 0.3micrometers to about 1.5 micrometers.
 11. A display device comprising: acolor filter substrate having a color filter layer on a substrate and abarrier layer over the color filter layer, the color filter layerfunctioning as a polarizer, and the barrier layer including bariumchloride (BaCl); an array substrate; and a liquid crystal layer betweenthe color filter substrate and the array substrate.
 12. The displaydevice according to claim 11, wherein the color filter substrate furtherincludes: a black matrix between portions of the color filter layer; anda common electrode over the color filter layer.
 13. The display deviceaccording to claim 11, wherein the color filter layer is made of aliquid crystal material deposited on the substrate, a liquid crystalphase of the liquid crystal material being oriented in one direction byapplying a force on the liquid crystal material in the one direction.14. The display device according to claim 11, wherein the color filterlayer includes a lyotropic liquid crystal material.
 15. The displaydevice according to claim 13, wherein the color filter layer polarizeslight, and the one direction of the color filter layer corresponds to atransmissive axis of the color filter layer.
 16. The display deviceaccording to claim 12, further comprising: a stabilization layer underthe color filter layer, the stabilization layer being located in atleast one open portion of the black matrix.
 17. The display deviceaccording to claim 16, wherein the stabilization layer has a thicknessin a range of about 100 angstroms to about 1,000 angstroms.
 18. Thedisplay device according to claim 16, wherein the stabilization layerincludes: a stabilization material layer in the at least one openportion of the black matrix, the stabilization material layer beingcomposed of one of solution type polyamic acid and methoxysilane. 19.The display device according to claim 13, wherein the liquid crystalmaterial is a red, green and blue dye based solution having acombination of amine and carboxylic acid.